CSZ MicroClimate Series - Cleaning the Humidity Sensor; Water Quality

MAINTENANCE WITH Q&A
Page 5-10
CLEANING THE HUMIDITY SENSOR
(Optional Equipment)
Please refer to the Vaisala manufacturer's manual for maintenance
and calibration information regarding the humidity sensor and its
components.
Be aware that there is an allowable tolerance for humidity readings:
1. < 90% + or - 2% and > 90% + or - 3% for the sensors within the
chambers.
2. Handheld accuracy is typically + or - 2% for quality instruments.
The recommended interval for calibration at least once a year. It is
also recommended to calibrate the sensor if it is not operating within
its stated accuracy limits.
WATER QUALITY
Puri! ed water is recommended for use with our humidity systems.
Water should be provided within 0.05 to 2M (.25 to 10ppm) DI, and
<2mg/L of free chlorine Distilled water or Reverse Osmosis (RO),
water outside of these limits may cause either corrosion or scaling.
Tap water may be used with our optional *Demineralizer Filtration
System. A *Recirculation Humidity Water Supply System is also
available. Inlet water pressure should not exceed 25 psi (172kPa)
for use with a boiler. A *Water Pressure Regulator must be used.
On units with a recirculating
water option, drain and clean
reservoir every two months
or sooner as required by
usage and water conditions.
NOTE
When using a separate hand-
held humidity sensor for
checking humidity readings
in the chamber, the probe
must be given at least 1
hour to stabilize within the
chamber after insertion.
Also be aware that the error
of the chamber probe and
error of the handheld must
be taken into consideration
when comparing readings.
If the chamber probe has
an accuracy of + or - 3%
and the hand-held has an
accuracy of + or - 2%, the
reading can be off by as much
as 5% and still be accurate.
NOTE
The filter on the end of the
humidity sensor must be in place
for the sensor to operate properly.
Operating the sensor without the
! lter will damage the instrument.
CAUTION
!